The SSH daemon must be configured for IP filtering.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-12022	GEN005540	SV-46108r1_rule		Medium

Description
The SSH daemon must be configured for IP filtering to provide a layered defense against connection attempts from unauthorized addresses.

STIG	Date
SUSE Linux Enterprise Server v11 for System z Security Technical Implementation Guide	2018-09-19

Details

Check Text ( C-43365r1_chk )
Check the TCP wrappers configuration files to determine if sshd is configured to use TCP wrappers. Procedure: # grep sshd /etc/hosts.deny # grep sshd /etc/hosts.allow If no entries are returned, the TCP wrappers are not configured for sshd, this is a finding.

Fix Text (F-39449r1_fix)
Add appropriate IP restrictions for SSH to the /etc/hosts.deny and/or /etc/hosts.allow files.